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Representing algorithms

Representing algorithms

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Question 1

An automated deep-sea research vessel's communication buoy only accepts telemetry uploads from two specific scientific underwater gliders. Their identifiers and cryptographic access keys are shown in Table 1 below:

Table 1
Glider IDAccess Key
Triton_7T7_abyss_88
Nereus_3N3_trench_41

Develop an algorithm, using either pseudo-code or a flowchart, to authenticate telemetry uploads.

The algorithm must:

  • Prompt the transmitting device to enter its Glider ID and Access Key.
  • Check if the Glider ID and Access Key combination is correct.
  • If correct, output 'upload authorised'.
  • If incorrect, continually prompt the device to re-enter both its Glider ID and Access Key until a valid combination is entered.
[6]
Markscheme

Representing algorithms Questions

  1. GCSE
  2. /Computer Science
  3. /Representing algorithms

208 exam-style questions on AQA GCSE Computer Science Representing algorithms. Each one has a worked solution and a mark scheme showing where the marks go.

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